Formation of CCbonds from CO2 is a much sought after reaction in organic synthesis. To date, other than CH carboxylations using stoichiometric amounts of metals, base, or organometallic reagents, little is known about CC bond formation. In fact, to the best of our knowledge no catalyticmethylation of CHbondsusing CO2 and H2 has been reported. Described herein is the combination of CO2 and H2 for efficient
由CO 2形成CC键是有机合成中非常需要的反应。迄今为止,除了使用化学计算量的金属,碱或有机金属试剂进行的CH羧化反应外,对CC键的形成知之甚少。实际上,据我们所知,没有报道使用CO 2和H 2催化CH键的甲基化。本文描述的是CO 2和H 2的组合,用于碳亲核试剂(如吲哚,吡咯和富电子芳烃)的有效甲基化。使用低聚甲醛的对比实验显示出与CO 2相似的反应性/ H 2系统。
Cu-Catalyzed Oxidation of C2 and C3 Alkyl-Substituted Indole via Acyl Nitroso Reagents
The selective oxidation of C2-alkyl-substituted indoles to 3-oxindole and the selective C–H oxygenation or amination of C2,C3-dialkyl-substituted indoles at C2 are reported under mild conditions. The position of the alkyl substitution on the indole directs the reaction to different pathways under similar conditions.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Direct C3 Alkylation of Indoles and Oxindoles
作者:Shyam Basak、Ana Alvarez-Montoya、Laura Winfrey、Rebecca L. Melen、Louis C. Morrill、Alexander P. Pulis
DOI:10.1021/acscatal.0c01141
日期:2020.4.17
The direct C3 alkylation of indoles and oxindoles is a challenging transformation, and only a few direct methods exist. Utilizing the underexplored ability of triaryl boranes to mediate the heterolytic cleavage of α-nitrogen C–H bonds in amines, we have developed a catalytic approach for the direct C3 alkylation of a wide range of indoles and oxindoles using amine-based alkylating agents. We also employed
Some Urethans of Phenolic Quaternary Ammonium Salts
作者:John H. Gardner、Joseph R. Stevens
DOI:10.1021/ja01204a047
日期:1947.12
ORGANIC ELECTROLUMINESCENCE ELEMENT, LIGHTING DEVICE AND DISPLAY DEVICE
申请人:Katakura Rie
公开号:US20100045171A1
公开(公告)日:2010-02-25
Disclosed is an organic electroluminescent device having high external quantum efficiency and long emission life. Also disclosed are an illuminating device and a display, each comprising such an organic electroluminescent device. The organic electroluminescent device is characterized by comprising at least an anode and a cathode on a supporting substrate, while having at least one light-emitting layer between the anode and the cathode. The organic electroluminescent device is also characterized by containing a polymer which at least partially contains a compound A having a partial structure represented by the general formula (a) below and a reactive group, and is obtained by polymerizing the compound A through the reactive group. (In the formula, Ar1 and Ar2 respectively represent an aromatic ring.)